Bob Lobel, a longtime sportscaster in Boston, will do Saturday games.
Henry Mahegan, a former Sox public relations maven and current school teacher, will do the bulk of night games.
A total of 342 people auditioned for the position to replace the late Carl Beane, who died last May.
Ian Browne is a reporter for MLB.com. Read his blog, Brownie Points, and follow him on Twitter @IanMBrowne. Jason Mastrodonato is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.